Air valve for bladders and other inflatable hollow bodies



Sept. 20, 19 32. s..sAu| 1,878,715

AIR VALVE FOR BLADDERS AND OTHER INFLATABLE HOLLOW BODIES Filed Jan. 24, 1930 czwwzz az": GM; 2 a (962/5 fifforrzeys Patented Sept. 20, 1932.

UNITED STATES PATENT. OFFICE SIEGFRIED SAUL, F AACHEN, GERMANY AIR VALVE FOR BLADDERS AND OTHER INFLATABLE HOLLOW BODIES Application filed- J'anuary 24, 1930, Serial No. 423,244, and in Belgium May 14, 1929.

My invention refers to an air valve for bladders and other inflatable bodies, and is an improvement of a device described in my I French Patent No. 588,679 granted February 5th, 1925. The principal object of my invention is an air valve which is of a simple construction and absolutely air-tight. Other objects of my invention will be apparent from the specification. A preferred embodiment of my invention is illustrated in the drawing.

Fig. 1 is a longitudinal section of a part of abladder to which an elastic body is tightly fixed which is to be turned into the valve.

Fig. 2 is a longitudinal section of the completed valve in its closed state, and

Fig. 3 alongitudinal section of the completed valve in its open state. First of all a body is made of rubber which body has in the unstrained state of its material the form of a top-hat having a rim 1 of suflicientbreadth to warrant a tight connection with a bladder 3 at the mouth opening thereof, as shown in Fig. 1. The hat-like body has a cylindrical wall 4 being adjacent the rim 1 and ending in a top wall 5 which is somewhat thickerthan the cylindrical wall 4.

turned into the completed valve and thereby brought into a strained state by completely squeezing the hat-like body through the mouth opening 2 of the bladder into the interior ofthe latter, thereby turning the hat like body inside out. The said body .is now in a strained state in which it has the shape of .a mushroom, as shown in Fig. 2. In consequence of the elasticity of the rubber the end wall 5 of the hat-like bod tends to return into its initial position, and t erefore the said end wall leans forcibly and tightly against the annular wall 4, whereby the orifices 6 become choked.- The annular wall 4 is somewhat widened under the pressureexerted by the thicker end wall 5 and highly stretched in radial direction, so that the orifices are hermetically closed.

pressed air to escape from the interior of the I bladderthrough said orifices, as shown in Fig. 3. During' the inflation of the bladder by means 0 an air pump the valve assumes at every'pressure stroke of the pump piston the shape which is shown in Fig 3, and according to which the end wallfi is bulged out towards the interior of the bladder, so that the orifices 6 become opened. After every pressurestroke of-the'piston the orifices areautomatically closed under the action of the compressed air in the interior of the bladder 3. K

As shown inthe Figures 2 and 3 the bladder I 3 is brought into connection with a ring 8 which fits tightly to the outer surface of the bladder around the mouth opening 2. The ring 8 has a centralopening 9 receiving the mouth piece of the air pump, and the ring has also a flange 10 which allows to keep said ring in tight connection with the bladder 3. 7

I claim: u

1. An air valve for bladders and other inflatablehollowbodies,comprisingahat-shaped body connected at its open end with the wall of an inflatable body and having an annular wall and an end wall, said annular wall hav ing openin s situated near said end wall said valve eing formed by inverting sai hat-shaped body inwardly of the inflatable body from the natural exterior position, the 35 lower part of said hat-shaped body in such inverted position being bulged outwardly by the pressure of the end wall against said lower part, thus closing said openings.

2. An air valve for bladders and other inflatable hollow bodies, comprising a hatshaped valve body connected at its open end with the wall of an inflatable body and having an annular wall and an end wall, said annular .wall having openings situated near said end wall, said valve being formed by inverting said valve body inwardly of the inflatable body from the natural exterior position, the lower partof' said valve body in such inverted position being bulgedoutit wardly by the pressure of the end wall against said lower part, said 0 nings being closed by the pressure of sai end wall and bein opened by ressing said end wall inside 0 'msaid inflata le body. 0 a T ,3. An air valve for bladders and other mflatable' hollow bodies, comprising a hatshaped valve body connectedat its 0' 11 end with the wall of an iatable body an having 1 an annular wall an an end wall, said en wall bein thicker than said annular wall,

said an ar wall having openings situated 4 near said end wall, said valve bein formed by inverting said valve body inwar ly of the u inflatable body from the natural exterior po- 'sition, the lower part of said valvebody in such inverted position being bulged outward- 1y by the pressure of the end. wall against said lower part, thus closing said openings.

4. An air valve for bladders and other inf flatable hollow bodies, comprising a tubular valve body extending in a strained state inside'of the bladder and provided with openings, a rim on said :bod tightly connected a with said bladder, an en wall-for said valve body, said end wall being thicker than said valve body, a ring tightly fitting on the outer surface of said bladder around the open end of said valve body and a flange on sa1d ring,

'a'the valve being ormed by inverting said tubular body inwardly of the bladder from the natural exterior, position, in such inverted v position the lower part of said tubular body being bulged outwardly by the pressure of '35 the end wall against said lower part, thus,-

closing said openings.

' Intestimony whereof I'ailixm signature 1 'SIEGERIE saun- 

